Not sure if this ever happens to you. But occasionally I fall into the same bathroom routine with another person on my floor. Every time I go to the bathroom this guy is either in there, entering or leaving, either way cross paths. Now this does not have to be same sex it can also happen with the opposite sex as well. I have a female co-worker that we somehow always were going to the bathroom at the same time. Like our bladders synced up or something. We were not stalking one another and we sit at opposite sides of the office so it was not like she saw me get up and go or I saw her leave and followed her or vice or versa. Weird stuff.